Elliptical drive stud



FIG. 1 is a perspective view of the elliptical socket drive stud showing my new design;

FIG. 2 is a top plan view thereof, the bottom plan view being unornamented;

FIG. 3 is a right side elevation view thereof;

FIG. 4 is a front elevation view thereof;

FIG. 5 is a rear elevation view thereof; and,

FIG. 6 is a left side elevation view thereof.

The broken line showing of a drive shaft in FIGS. 1-6 and a wrench in FIG. 1 is for illustration purposes and forms no part of the claimed design. 

The ornamental design for "elliptical drive stud", as shown and described. 